That wouldn't even be a thing if not for so many melee characters being bad. I've had groups were the Dragoon/Monk didn't really get hit at all and I've had groups were the Dragoon/Monk had to be raised a couple times during the fight due to being hit by swipes. Was it the tanks fault? Who knows, but the point is, in my experience, I run into more melee's like the latter than the former. Which is apparently most people's experience as that's how these sorts of stigmas start in the first place.
You can talk down to me all you want, but the fact is, there wouldn't be such a stigma if there wasn't truth to it.